CN111666669A - Method for determining water replenishing rate of circulating water cooling system through concentration ratio - Google Patents
Method for determining water replenishing rate of circulating water cooling system through concentration ratio Download PDFInfo
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- CN111666669A CN111666669A CN202010474577.1A CN202010474577A CN111666669A CN 111666669 A CN111666669 A CN 111666669A CN 202010474577 A CN202010474577 A CN 202010474577A CN 111666669 A CN111666669 A CN 111666669A
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- water
- cooling system
- ions
- circulating water
- water cooling
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 110
- 238000001816 cooling Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 8
- -1 fluoride ions Chemical class 0.000 claims description 14
- 239000013589 supplement Substances 0.000 claims description 11
- 150000002500 ions Chemical class 0.000 claims description 10
- 229910001414 potassium ion Inorganic materials 0.000 claims description 8
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims description 6
- 229910001425 magnesium ion Inorganic materials 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 230000001502 supplementing effect Effects 0.000 claims description 5
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 4
- 229910001424 calcium ion Inorganic materials 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 4
- 230000008020 evaporation Effects 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229910002651 NO3 Inorganic materials 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000005286 illumination Methods 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910001415 sodium ion Inorganic materials 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012821 model calculation Methods 0.000 description 3
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
The invention discloses a method for determining the water replenishing rate of a circulating water cooling system through concentration ratio, which can objectively and truly reflect the operation parameters of the circulating water system and timely adjust and troubleshoot problems in operation, thereby accurately controlling the water replenishing rate of the system, reducing the consumption of new water of the system and realizing the effects of energy conservation and emission reduction.
Description
Technical Field
The invention belongs to the field of environmental engineering, and particularly relates to a method for determining the water replenishing rate of a circulating water cooling system through concentration ratio.
Background
Taking steel enterprises as an example, the circulating water cooling system has wide application and is essential to the production of the enterprises. Most of the operation modes are that water after exchanging heat with equipment is conveyed into the tower by a lifting pump, and then the water and air exchange heat or heat and mass exchange so as to achieve the purpose of reducing the water temperature.
Water management level of a water system of a developed foreign country is high, water is generally recycled and treated as much as possible and non-traditional water resources are considered as a supplementary water source, so that the consumption of new water and the amount of discharged wastewater are reduced. Although the national environmental protection policy is becoming stricter and the enterprise is paying more attention to the management of water resources at present, the correlation between the concentration ratio and the water replenishing rate of the circulating system is not described quantitatively by using a mathematical model theory.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the method for determining the water replenishing rate of the circulating water cooling system through the concentration ratio, which can objectively and truly reflect the operation parameters of the circulating water system and timely adjust and investigate the problems in operation, thereby accurately controlling the water replenishing rate of the system, reducing the consumption of new water of the system and realizing the effects of energy conservation and emission reduction.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for determining the water replenishing rate of a circulating water cooling system through concentration ratio is characterized by comprising the following steps: the circulating water cooling system is an open circulating water cooling system, comprises all pipeline valves, a cooling tower system and a production process heat exchange system and is in a stable operation state;
the only water replenishing rate entering the circulating water cooling system is F0The discharge water rate of the circulating water cooling system comprises F1And F2In which F is1Is the rate of discharge of the salt-carrying substances, F2The water discharge rate is the water discharge rate discharged only in the form of water molecules;
the concentration of each ion in the circulating water cooling system is C11，C12，C13····C1(n-1)，C1nAnd C is11＜C12＜C13····C1(n-1)＜C1nThe concentration of each ion in the corresponding water supplement is C01，C02，C03····C0(n-1)，C0nConcentration multiplying factor N ═ C of circulating water cooling system11+C12+C13+····+C1(n-1)+C1n)/(C01+C02+C03+····+C0(n-1)+C0n) N is 3-5;
ions in the circulating water cooling system include but are not limited to sodium ions, potassium ions, chloride ions, fluoride ions, calcium ions, magnesium ions, sulfate ions, nitrate ions, silicon ions, iron ions and aluminum ions, the concentration of the ions does not change within 24 hours under the condition of normal temperature and normal pressure illumination, and the ions are not contained in the agent brought into the surrounding environment and added into the system;
said F0Only supplementing water for manual work, neglecting the influence of natural conditions, including but not limited to rain, snow and hail;
said F1The salt substances with the same concentration as the circulating water cooling system are contained in the circulating water cooling system, the pollution discharge of the circulating water cooling system is limited, the leakage rate of the circulating water cooling system is zero, and the influence of phenomena such as drifting, splashing and leakage is ignored and not limited;
said F2The water is discharged into the environment in the form of water molecules, including but not limited to evaporation on the water surface and evaporation of water on the object surface, and is a constant under natural conditions;
according to water balance: f0＝F1+F2；
According to the balance of water quality salt substances: f0＝F1·N
Thus, F0＝N·F2/(N-1)。
Said F2The value is 0.01-0.02.
The invention has the beneficial effects that: the concentration ratio numerical value of the circulating system can be objectively and truly obtained, so that the water replenishing rate of the system is accurately controlled, the new water consumption of the system is reduced, and the effects of energy conservation and emission reduction are realized.
Detailed Description
The following description is given with reference to specific examples:
example 1:
an open circulating water cooling system with long-term stable operation, the water supplementing rate measured by practice is 0.02, F2The constant of (2) is 0.01, the concentration of potassium ions in a circulating system is 11.2mg/L, the concentration of magnesium ions is 23.8mg/L, and the concentration of chloride ions is 42.1 mg/L; the potassium ion concentration in the water is 3.8mg/L, the magnesium ion concentration is 8.2mg/L, and the chloride ion concentration is 14.1 mg/L.
So that N ═ 2.95 (11.2+23.8+42.1)/(3.8+8.2+14.1),
water supply rate of system F0＝2.95×0.01/(2.95-1)＝0.015。
The real water supplement rate of the system obtained through model calculation is smaller than the water supplement rate obtained through actual measurement, so that the problem that the water supplement rate of the system is high is judged. By checking the problems existing in the operation of the system, the actual water replenishing rate is reduced, and the reduction of the new water consumption is realized.
Example 2:
an open circulating water cooling system with long-term stable operation has a water supplementing rate of 0.026 and F measured actually2The constant of (2) is 0.015, the concentration of silicon ions in a circulating system is 1.3mg/L, the concentration of potassium ions is 17.9mg/L, and the concentration of magnesium ions is 21.5 mg/L; the concentration of silicon ions in the water is 0.24mg/L, the concentration of potassium ions is 3.2mg/L, and the concentration of magnesium ions is 5.1 mg/L.
So that N ═ 1.3+17.9+21.5)/(0.24+3.2+5.1) ═ 4.77,
water supply rate of system F0＝4.77×0.015/(4.77-1)＝0.019。
The real water supplement rate of the system obtained through model calculation is smaller than the water supplement rate obtained through actual measurement, so that the problem that the water supplement rate of the system is high is judged. By checking the problems existing in the operation of the system, the actual water replenishing rate is reduced, and the reduction of the new water consumption is realized.
Example 3:
an open circulating water cooling system with long-term stable operation has a water supplementing rate of 0.032 and F2The constant of (2) is 0.02, the concentration of silicon ions in a circulating system is 2.4mg/L, the concentration of potassium ions is 15.1mg/L, and the concentration of calcium ions is 48.6 mg/L; silicon ions in the make-up waterThe concentration is 1.54mg/L, the potassium ion concentration is 3.4mg/L, and the calcium ion concentration is 13.6 mg/L.
So that N ═ 2.4+15.1+48.6)/(1.54+3.4+13.6) ═ 3.57,
water supply rate of system F0＝3.57×0.02/(3.57-1)＝0.028。
The real water supplement rate of the system obtained through model calculation is smaller than the water supplement rate obtained through actual measurement, so that the problem that the water supplement rate of the system is high is judged. By checking the problems existing in the operation of the system, the actual water replenishing rate is reduced, and the reduction of the new water consumption is realized.
Claims (2)
1. A method for determining the water replenishing rate of a circulating water cooling system through concentration ratio is characterized by comprising the following steps: the circulating water cooling system is an open circulating water cooling system, comprises all pipeline valves, a cooling tower system and a production process heat exchange system and is in a stable operation state;
the only water replenishing rate entering the circulating water cooling system is F0The discharge water rate of the circulating water cooling system comprises F1And F2In which F is1Is the rate of discharge of the salt-carrying substances, F2The water discharge rate is the water discharge rate discharged only in the form of water molecules;
the concentration of each ion in the circulating water cooling system is C11，C12，C13····C1(n-1)，C1nAnd C is11＜C12＜C13····C1(n-1)＜C1nThe concentration of each ion in the corresponding water supplement is C01，C02，C03····C0(n-1)，C0nConcentration multiplying factor N ═ C of circulating water cooling system11+C12+C13+····+C1(n-1)+C1n)/(C01+C02+C03+····+C0(n-1)+C0n) N is 3-5;
ions in the circulating water cooling system include but are not limited to sodium ions, potassium ions, chloride ions, fluoride ions, calcium ions, magnesium ions, sulfate ions, nitrate ions, silicon ions, iron ions and aluminum ions, the concentration of the ions does not change within 24 hours under the condition of normal temperature and normal pressure illumination, and the ions are not contained in the agent brought into the surrounding environment and added into the system;
said F0Only supplementing water for manual work, neglecting the influence of natural conditions, including but not limited to rain, snow and hail;
said F1The salt substances with the same concentration as the circulating water cooling system are contained in the circulating water cooling system, the pollution discharge of the circulating water cooling system is limited, the leakage rate of the circulating water cooling system is zero, and the influence of phenomena such as drifting, splashing and leakage is ignored and not limited;
said F2The water is discharged into the environment in the form of water molecules, including but not limited to evaporation on the water surface and evaporation of water on the object surface, and is a constant under natural conditions;
according to water balance: f0＝F1+F2；
According to the balance of water quality salt substances: f0＝F1·N
Thus, F0＝N·F2/(N-1)。
2. The method for determining the water replenishing rate of the circulating water cooling system through the concentration rate as claimed in claim 1, wherein: said F2The value is 0.01-0.02.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010474577.1A CN111666669A (en) | 2020-05-29 | 2020-05-29 | Method for determining water replenishing rate of circulating water cooling system through concentration ratio |
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| CN202010474577.1A CN111666669A (en) | 2020-05-29 | 2020-05-29 | Method for determining water replenishing rate of circulating water cooling system through concentration ratio |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1996003A (en) * | 2007-01-04 | 2007-07-11 | 北京交通大学 | On-line monitoring method for concentration rate of circulating cooling water |
| JP2011203031A (en) * | 2010-03-25 | 2011-10-13 | Aquas Corp | Quality measuring method of cooling water, quality control method of cooling water, and method for injecting water treatment chemical agent in cooling water |
| CN104991579A (en) * | 2015-07-03 | 2015-10-21 | 西安西热水务环保有限公司 | System and method for controlling concentration ratio of open type circulating cooling water system |
| KR101629334B1 (en) * | 2015-01-27 | 2016-06-10 | 엘지전자 주식회사 | Drinking water supplying device and method for controlling the same |
| CN208297485U (en) * | 2018-05-13 | 2018-12-28 | 中国大唐集团科学技术研究院有限公司华中分公司 | New Cycle cooling water concentration rate on-line detecting system |
| CN109240358A (en) * | 2018-09-14 | 2019-01-18 | 西安热工研究院有限公司 | A kind of recirculated water concentration rate automatic control system and method |
| CN109457754A (en) * | 2018-12-05 | 2019-03-12 | 北京朗新明环保科技有限公司 | Thermal power plant's water island shelf structure based on intelligent water utilities |
-
2020
- 2020-05-29 CN CN202010474577.1A patent/CN111666669A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1996003A (en) * | 2007-01-04 | 2007-07-11 | 北京交通大学 | On-line monitoring method for concentration rate of circulating cooling water |
| JP2011203031A (en) * | 2010-03-25 | 2011-10-13 | Aquas Corp | Quality measuring method of cooling water, quality control method of cooling water, and method for injecting water treatment chemical agent in cooling water |
| KR101629334B1 (en) * | 2015-01-27 | 2016-06-10 | 엘지전자 주식회사 | Drinking water supplying device and method for controlling the same |
| CN104991579A (en) * | 2015-07-03 | 2015-10-21 | 西安西热水务环保有限公司 | System and method for controlling concentration ratio of open type circulating cooling water system |
| CN208297485U (en) * | 2018-05-13 | 2018-12-28 | 中国大唐集团科学技术研究院有限公司华中分公司 | New Cycle cooling water concentration rate on-line detecting system |
| CN109240358A (en) * | 2018-09-14 | 2019-01-18 | 西安热工研究院有限公司 | A kind of recirculated water concentration rate automatic control system and method |
| CN109457754A (en) * | 2018-12-05 | 2019-03-12 | 北京朗新明环保科技有限公司 | Thermal power plant's water island shelf structure based on intelligent water utilities |
Non-Patent Citations (1)
| Title |
|---|
| 陆柱等, 华东理工大学出版社 * |
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